RFOG modulation error correction

Details RFOG modulation error correction RFOG modulation error correction

2008-07-02

2010-12-21

Lyons, Michael A (Department: 2877)

Optics: measuring and testing

By light interference

Rotation rate

Reexamination Certificate

active

07855789

ABSTRACT:
Systems and methods for performing modulation error correction. An example system applies common phase/frequency modulation to first and second laser beams, a first intensity modulation to the first modulated beam, and a second intensity modulation to the second modulated beam. Signals outputted are demodulated according to the frequency of the common phase/frequency modulation. Then the first of these demodulated signals is demodulated based on the frequency of the intensity modulation of the first beam, and the second of these demodulated signals is demodulated based on the frequency of the intensity modulation of the second beam. Then, rate of rotation is determined based on demodulated signals. Frequencies of the intensity modulations are unequal and not harmonically related, and intensity modulation encodes each light beam with a unique signature.

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